Improvement in rotary engines



s. M. DANS. ROTARY ENGINE.

No. 49,610. y Patented Aug. 29, 1865.

UNITED STATES PATENT OFFICE.

SETH M. DAVISQOF RSHVILLE, MSSOURI.

IMPROVEMENT IN ROTARY ENGINES.

Specification forming part of Letters` Patent No. 49,610, dated August 29, 1865.

parts. Fig. 2 is a transverse verticalsection of the same.

To enable those skilled in the art to construct and use my engine, l will proceed to describe its'construction and operation.

A circular groove formed by the annular plates A, boltedto the sides of the annular plate B, the inner diameters of which they overlap, forms the cylinder within which the pistons P revolve. There are two pistons P P, which are `irmly secured to the periphery ot the wheel C', which revolves around the hub D, the huh remaining stationary and forming the steam-chest, from the open ports e e e e of l'which steam is introduced into thecylinder through the tubular openings a n, which are made in the wheel C for that purpose.

The longitudinal axes of the tubes a a are radial from the center ot the hub or steamchest, and the an gie which they inclose is equal to one hundred and thirty-tive degrees. rlhe pistons are wedge-shaped, the sharp points ot' the wedges being directed forward, as it is intended this engine shall work only in one direction, without any reverse motion.

The back ends ofthe pistons, against which the steam presses, are made flat, and are radial from the center ot' the Wheel G, with the periphery of which they join just in advance of and close to the orifices ot' the tubes a a, so that the two pistons inclose threeeghths of the periphery of the wheel O between them.

' The steam-ports e c e e are each of them made to take up one-quarter of the periphery of the hub D, and the space left between each two of the ports is equal tolthe length of one tioned.

. port. -This arrangement of the steam-ports,in

connection with that ot' the steam-pipes a a, already described, secures the oritlce ot' one ot' the steam-pipes being constantly over one of the open ports, so that direct steam is constantly pressing upon one piston. There are four piston-heads, E, hinged to the annular platesA, at regular intervals, in such a manner that when they are shut up they close entirely the cylinder in which the pistons revolve.

Recesses are formed in the annular plate B', into which these piston-heads fall, in order te allow the pistonsto pass over them unobstructed. There is a small spring, t', attached to the backs of the piston-heads to throw them out ot' the recesses, so that the steam may strike on the back side of them as soon as thepiston shall havepassed and throw Ehem up tothe seat upon which they arev to rest when the steam is upon them.

The sharp end ot' the wedged pistons will strike each ot' these heads in succession and throw them back out of the way while the pistous are passing that particular point, after which the spring will throw out the heads agaimready to receive the steam, as before men- Suitable lnetallic packing, ne, is introduced around the hub D, in order to secure a steam-tightjoint between it and the wheel C. Packing .fc is also used to make a tight joint between the wheelG and the annular plates A.

There are four exhaust-ports, F, arranged around the periphery ot the plate B at regular intervals. rihese ports are locatedjust behind the cylinder-heads E. The whole ot' the stationaryportions of this engine is erected upon suitable frame-work, M.

Having described my engine, I claim- Two pistons, l? l?, in combination with the steainlpipes u a and the steam-ports e e e e ot' the steam-chest D, when constructed as de scribed and set forth.

SETE M. DAVIS.A

Witnesses:

M. RANDQLPH, A. WAGNER. 

